5 letter words:
prick13,
crook11,
iroko9,
koori9,
poori7,
4 letter words:
pick12,
pock12,
cook10,
cork10,
pook10,
pork10,
rick10,
rock10,
coop8,
crop8,
koro8,
poco8,
rook8,
coir6,
poor6,
proo6,
roop6,
3 letter words:
ick9,
kip9,
kop9,
cop7,
irk7,
kir7,
koi7,
kor7,
oik7,
pic7,
rok7,
coo5,
cor5,
oop5,
orc5,
pir5,
poi5,
poo5,
pro5,
rip5,
roc5,
oor3,
roo3,
2 letter words:
ki6,
ko6,
op4,
pi4,
po4,
io2,
oi2,
oo2,
or2,